Answer:
Number of packs of football cards = 6 , hockey cards = 3 , baseball cards = 8
Explanation:
Number of packs of baseball cards = 8
Let the number of packs of football cards = x
Number of packs of hockey cards = x - 3
Total number of packs = 17
=> 8 + x + (x-3) = 17
=> 8 + 2x -3 = 17
=> 2x = 17 - 5 = 12
=> x = 12/2 = 6
So the number of packs of football cards = 6
Number of packs of hockey cards = 6 - 3 = 3
Validation:
Adding all the packs together:
Baseball + Hockey + Football
= 8 + 3 + 6 = 17
This satisfies the requirement that total number of packs is 17.